/*
 * Copyright 2022 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.sample.files;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http2.Http2SecurityUtil;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.ssl.ApplicationProtocolConfig;
import io.netty.handler.ssl.ApplicationProtocolNames;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.SslProvider;
import io.netty.handler.ssl.SupportedCipherSuiteFilter;
import io.netty.handler.ssl.util.SelfSignedCertificate;

public final class Http2StaticFileServer {

	private static final int PORT = Integer.parseInt(System.getProperty("port", "8443"));

	public static void main(String[] args) throws Exception {
		SelfSignedCertificate ssc = new SelfSignedCertificate();
		SslContext sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
				.sslProvider(SslProvider.JDK).ciphers(Http2SecurityUtil.CIPHERS, SupportedCipherSuiteFilter.INSTANCE)
				.applicationProtocolConfig(new ApplicationProtocolConfig(ApplicationProtocolConfig.Protocol.ALPN,
						// NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK
						// providers.
						ApplicationProtocolConfig.SelectorFailureBehavior.NO_ADVERTISE,
						// ACCEPT is currently the only mode supported by both OpenSsl and JDK
						// providers.
						ApplicationProtocolConfig.SelectedListenerFailureBehavior.ACCEPT,
						ApplicationProtocolNames.HTTP_2, ApplicationProtocolNames.HTTP_1_1))
				.build();

		EventLoopGroup bossGroup = new NioEventLoopGroup(2);
		EventLoopGroup workerGroup = new NioEventLoopGroup(4);
		try {
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
					.handler(new LoggingHandler(LogLevel.INFO))
					.childHandler(new Http2StaticFileServerInitializer(sslCtx));

			Channel ch = b.bind(PORT).sync().channel();

			System.out.println("Open your web browser and navigate to https://127.0.0.1:" + PORT + '/');

			ch.closeFuture().sync();
		} finally {
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}
}
